Add ability to edit forms and add new fields

This commit adds the ability to edit and modify existing forms.
On the technical side, it also adds a new reusable validation Facade which helps reduce duplicated code.

app/Providers/ContextAwareValidatorProvider.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Providers;
+
+use Illuminate\Support\ServiceProvider;
+
+use App;
+
+class ContextAwareValidatorProvider extends ServiceProvider
+{
+    /**
+     * Register services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        //
+    }
+
+    /**
+     * Bootstrap services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+      App::bind('contextAwareValidator', function(){
+
+          return new App\Helpers\ContextAwareValidator();
+
+      });
+    }
+}